* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

.father {
    width: 60vw;
}

.top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: relative;
}

.one {
    width: 50px;
    height: 50px;
    background-color: #fff;
    border-style: solid;
    border-width: 5px;
    border-radius: 50%;
    text-align: center;
    line-height: 40px;
    border-color: rgb(0, 0, 0, .3);
    transition: all 0.8s ease;
}

.top::before {
    content: "";
    border-width: 4px;
    border-style: solid;
    border-color: rgb(0, 0, 0, .3);
    width: 95%;
    position: absolute;
    top: 50%;
    margin-top: -2px;
    /* left: -5px; */
    z-index: -1;
}

.bottom {
    display: flex;
    height: 100px;
    align-items: center;
    justify-content: center;
}

.btn,.next {
    padding: 8px 25px;
    margin-right: 10px;
    border-radius: 6px;
    border: 0;
    font-size: 20px;
    background-color: rgb(0, 120, 218);
}
.color {
    border-width: 4px;
    border-style: solid;
    border-color: rgb(0, 120, 218);
    width: 0%;
    position: absolute;
    top: 50%;
    margin-top: -2px;
    z-index: -1;
    transition: width 0.8s ease;
}
.active {
    border-color: rgb(0, 120, 218);
}
button:active {
    transform: scale(0.9);
}
button:disabled {
    background-color: rgb(0,0,0,.3);
    cursor: not-allowed;
}